Propellant treatment and continuous foam removal of well debris

Details Propellant treatment and continuous foam removal of well debris Propellant treatment and continuous foam removal of well debris

E - Fixed Constructions

21

B

E21B 21/14 (2006.01) E21B 37/00 (2006.01) E21B 43/25 (2006.01) E21B 43/263 (2006.01)

Patent

CA 2447556

A damaged formation is stimulated by igniting a propellant adjacent openings in the wellbore in communication with the damaged formation. Substantially immediately thereafter, low density foam is injected adjacent the openings and circulated to the surface for the removal of debris released from the formation. A tubing string has a foam discharge port at a distal end and a foam injection port at surface. The tubing string extends sufficiently above the wellbore at surface to enable lowering of the tubing string and foam discharge port to below the openings for enhanced removal of debris

Une formation endommagée est stimulée par l'allumage d'une charge propulsive adjacente à des ouvertures dans le puits de forage qui communiquent avec la formation endommagée. Essentiellement immédiatement après, une mousse de faible densité est injectée à côté des ouvertures et circule jusqu'à la surface à des fins d'élimination des débris libérés par la formation. La colonne de production comprend un orifice de décharge de mousse à une extrémité distale et un orifice d'injection de mousse à la surface. La colonne de production s'étend suffisamment au-dessus du puits de forage, à la surface, pour permettre la descente de la colonne de production et de l'orifice de décharge de mousse jusqu'au-dessous des ouvertures, ce qui rend l'élimination des débris plus efficace.

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